McMaster-Carr logo
    Filter by
    Power Source
    Electrical Connection
    Detects
    Material
    Mounting Location
    Wire Connection
    Cover Color
    Maximum Temperature
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Minimum Temperature
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Tandem Signaling Capable
    Frequency
    Depth
    Height
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    6 Products

    Smoke Detectors for HVAC Systems

    Image of ProductInUse. Front orientation. Contains Annotated. Smoke Detectors. Smoke Detectors for HVAC Systems.
    Detect the presence of smoke in ducts and shut down HVAC units to avoid circulation. These sensors and controllers have standard RJ45 connections, so they work with most alarm systems and quickly snap in without needing to connect individual wires to terminals. UL and C-UL listed as well as FM and MEA approved, they meet strict safety standards. Choose from a sensor, controller, or sensor and controller unit.
    Sensors
    Image of Product. Front orientation. Smoke Detectors. Smoke Detectors for HVAC Systems, Sensors.
    Sensors measure rapid changes in air flow from smoke and fire but won’t register dust and debris, so they won’t cause a false alarm.
    Lg.
    Wd.
    Dp.
    Max. No. of
    Tandem Sensors
    Wire
    Connection
    Output Voltage,
    V DC
    Input Voltage
    Temp.,
    ° F
    Mounting Hardware
    Included
    Certification
    Each
    8 3/4"5 1/2"1 7/8"30Screw Terminal1824V AC, 24V DC, 120V AC, 230V AC0 to 155YesC-UL Listed, FM Approved, UL Listed
    		3930N120000000
    Accessories for Smoke Detectors
    Sampling Tubes
    Image of Product. Front orientation. Smoke Detector Tubes. Smoke Detectors for HVAC Systems.
    Sensors require sampling tubes to bring in air from the duct. Mount the sampling tube inside the duct and connect it to the sensor on the outside of the duct by drilling a hole with the included template. For duct up to 36" wide, the sampling tube’s length should be 2/3 the width of the duct.
    Lg.
    Each
    8"3930N14000000
    24"3930N1500000
    Remote Test Stations
    Image of Product. Front orientation. Smoke Detector Test Stations. Smoke Detectors for HVAC Systems.
    If your smoke detectors are hard to access, use remote test stations to check that they’re working properly from a convenient location. Wire these test stations to your smoke detector controller to test difficult to access smoke detectors from a convenient location. Indicator lights show if your smoke detector is powered on, if it senses smoke, and if its sensors are too dirty to detect smoke and need cleaning. These test stations activate with the turn of a key so you don’t turn them on by accident.
    Actuator
    Style
    Switch Starting
    Position
    No. of
    Terminals
    Switch
    Designation
    Voltage
    Temp.,
    ° F
    Wire
    Connection
    Wd.
    Ht.
    Mounting Hardware
    Included
    Certification
    Each
    Key1 Off
    		5SPST-NO
    		24V AC, 24V DC, 120V AC, 230V AC32 to 130Screw Terminal3"4 3/4"YesC-UL Listed, FM Approved, UL Listed
    		4000N12000000
    Controllers
    Image of Product. Front orientation. Smoke Detectors. Smoke Detectors for HVAC Systems, Controllers.
    Controllers send signals from your sensor to a fire alarm control panel, which closes HVAC dampers when smoke is detected. Controllers can be installed up to 15 ft. away from your sensors and connected with cable. Connect up to two sensors per controller to monitor two sections of ductwork.
    Lg.
    Wd.
    Dp.
    For Max. No.
    of Sensors
    Max. No. of Tandem
    Controllers
    Wire
    Connection
    Output Voltage,
    V DC
    Input Voltage
    Temp.,
    ° F
    Mounting Hardware
    Included
    Certification
    Each
    6 3/4"5 1/2"1 7/8"215Screw Terminal1824V AC, 24V DC, 120V AC, 230V AC0 to 155YesC-UL Listed, FM Approved, UL Listed
    		3930N110000000
    Sensors and Controllers
    Image of Product. Front orientation. Smoke Detectors. Smoke Detectors for HVAC Systems, Sensors and Controllers.
    Sensor and controller units come with one controller and one sensor. Connect another sensor to cover another spot in your HVAC system.
    Lg.
    Wd.
    Dp.
    Max. No. of Tandem
    Controllers
    Max. No. of
    Tandem Sensors
    Wire
    Connection
    Output Voltage,
    V DC
    Input Voltage
    Temp.,
    ° F
    Mounting Hardware
    Included
    Certification
    Each
    14 1/2"5 1/2"1 7/8"1530Screw Terminal1824V AC, 24V DC, 120V AC, 230V AC0 to 155YesC-UL Listed, FM Approved, UL Listed
    		3930N130000000
    Accessories for Smoke Detectors
    Sampling Tubes
    Image of Product. Front orientation. Smoke Detector Tubes. Smoke Detectors for HVAC Systems.
    Sensors require sampling tubes to bring in air from the duct. Mount the sampling tube inside the duct and connect it to the sensor on the outside of the duct by drilling a hole with the included template. For duct up to 36" wide, the sampling tube’s length should be 2/3 the width of the duct.
    Lg.
    Each
    8"3930N14000000
    24"3930N1500000
    Remote Test Stations
    Image of Product. Front orientation. Smoke Detector Test Stations. Smoke Detectors for HVAC Systems.
    If your smoke detectors are hard to access, use remote test stations to check that they’re working properly from a convenient location. Wire these test stations to your smoke detector controller to test difficult to access smoke detectors from a convenient location. Indicator lights show if your smoke detector is powered on, if it senses smoke, and if its sensors are too dirty to detect smoke and need cleaning. These test stations activate with the turn of a key so you don’t turn them on by accident.
    Actuator
    Style
    Switch Starting
    Position
    No. of
    Terminals
    Switch
    Designation
    Voltage
    Temp.,
    ° F
    Wire
    Connection
    Wd.
    Ht.
    Mounting Hardware
    Included
    Certification
    Each
    Key1 Off
    		5SPST-NO
    		24V AC, 24V DC, 120V AC, 230V AC32 to 130Screw Terminal3"4 3/4"YesC-UL Listed, FM Approved, UL Listed
    		4000N12000000

    Remote Smoke Detector Test Stations for HVAC Systems

    Image of Product. Front orientation. Smoke Detector Test Stations.
    Check that your HVAC smoke detector is working properly. Wire these test stations to your smoke detector controller to test difficult to access smoke detectors from a convenient location. Indicator lights show if your smoke detector is powered on, if it senses smoke, and if its sensors are too dirty to detect smoke and need cleaning. These test stations activate with the turn of a key so you don’t turn them on by accident.
    Actuator
    Style
    Switch Starting
    Position
    No. of
    Terminals
    Switch
    Designation
    Voltage
    Temp. Range,
    ° F
    Wire
    Connection
    Wd.
    Ht.
    Mounting Hardware
    Included
    Certification
    Each
    Key1 Off
    		5SPST-NO
    		24V AC, 24V DC, 120V AC, 230V AC32 to 130Screw Terminal3"4 3/4"YesC-UL Listed, FM Approved, UL Listed
    		4000N12000000
    back to top